Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:28:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[node].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:109:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1;i < rez.size();++i) ^ user.cpp:103:16: warning: ‘node’ may be used uninitialized in this function [-Wmaybe-uninitialized] grade_G[node]--; ^ user.cpp:53:18: warning: ‘Start’ may be used uninitialized in this function [-Wmaybe-uninitialized] int nr_odd = 0, Start, fixed = 0; ^